John h



tinned gala JOHN H. CRANE AND CHARLES W. CRANE, OF CHARLESTOWN,

MASSACHUSETT Letters Patent No. 90,505, dated May 25, 1869.

PROCESS or MAKING- ommmnnmi. stems, ate.

The Schedule referred to in these Letters Patent and making part of thesame.

To all whom it mwy concern Be it known that we, JOHN H. Onnnnand CHARLESW. CRANE, both of Oharlestown, in the'connty of Middlesex, and State ofMassachusetts, have invented an Improvement in the Manufacture of Signs,&c.; and we do hereby declare that the following is a description of ourinvention snificient to enable those skilled in the actto practise it.

This invention relates to securing upon one side of a. transparentmaterial, preferably glass, other mate rials which are made to adhere tothe glass, and which, by their form and contrasted colors, exhibitletters, figures, and ornamental and other forms and outlines; saidinvention being intended for the production of ornamental signs,advertising-plaoards, 85c.

- In the practice of our invention we coat onesurface of the glass witha pigment of any desired color, which is mixed with water or with othersuitable fluid which will evaporate and leave the pigment uniformlycoated upon the glass. I

This coating must be so mixed that it will not adhere tenaciously to theglass, like an oil, paint, or a varnish; still, it should have a slightcohesion of its own particles together and to the. glass, merely toprevent the coating from falling off when dry' and under themanipulation to which it is subjected; but the cohesion must not be suchas will prevent easy removal of the coating under the rubbing action ofa still bruslnapplied with some force.

Turpentine will generally supply sufficient cementitions matter to thepigment, if used for the fluid with which the pigment is mixed, or ifwater is used, a slight size of glue or gum-arabic, or other equivalentmatter, may be added.

Suppose the object to be made is to he a businesssign with aninscription, then we proceed as follows:

Over the dry pigment, made and applied as before described, we place,where we desire to show letters, stencil-plates in proper position andarrangement, and then, with a stiifbrush, remove the pigmentwhereexposed through the stencil-plates. Then the whole surface of the glasson which the pigment rests, which surface is to be the back side of thesign or show-card, is coated with varnish or oil, which permeates thepigment and causes it toadhere tenaciously to the glass,

and resists moisture. Dry pigments, of any desired the oil or varnish onsaid surfaces, not being dry,

be made to adhere similarly to the glass, to give any I desiredappearance of letters, figures, 850., such, for example, as gold,silver, and other metallic leaf or foil, or ornamental paper, orbronze-powder or pearl dust, 8w.

The materials applied to the clearsurfaces of the glass, to showletters, figures, &c., in contrast with the body-color, may, if desired,be protected on the back by a coat or coats of oil, paint, varnish, 870.

After the dry pigment of the body-coat upon the glass has been in partremoved, to show the forms of letters, figures, 800., and has been oiledor varnished, and if the oil or varnish has been allowed to dry, theclear glass spaces may be coated with colored paints, or they may beagain coated with oil or varnish, upon which second coat, before itbecomes dry, powders or other suitable materials may be placed; andwhen, by the drying of the oil or varnish, they are made to adhere tothe glass, they may be protected on the back by paint, oil, or varnish.

Prior to our invention, signs, show-cards, 860., have been made uponglass by making the outlines of the letters, figures, 8tc., by a brush,with oil-paint, and then filling, also with a brush, around and up tothe outline first traced with oil-color, after which the clear glasssurfaces left, have, when the body color of oilpaint has become dry,been filled by -oil-paints, or have been gilded, silver-ed, and powderedby first sizing the clear glass surfaces.

But by use of the slightly adhering body-color, applied all over thesurface of the glass, the process of obtaining. the shapes of theletters, figures, 860., is so much facilitated as to greatly cheapen thecost of signs, 860., the quality of the work done being fully equal tothat in which an oil body-color is used.

We claim the process described for the manufacture of signs, 860., andas. a new manufacture, signs, 850., produced by the described process.

JOHN H.- CRANE. CHARLES W. CRANE.

Witnesses:

J. B. ORosBY, FRANCIS Goum).

